RU201601U1 - DEVICE FOR REGISTRATION AND STORAGE OF DATA ON CURRENT CONSUMPED BY THE ELECTRIC MOTOR LOCOMOTIVE - Google Patents

Abstract

The utility model relates to the field of data collection tools, in particular to devices for collecting data on the traction motor of a locomotive. EFFECT: reduced memory volume required for storing and transmitting data on the operation of a traction electric motor (TED) of a locomotive. Essence: a device for collecting data on a traction electric motor of a locomotive comprises a body, a current sensor data receiving unit configured to receive data on the current consumed by a traction electric motor, a data processing unit configured to receive data from a current sensor data receiving unit, a data storage unit, configured to receive data from the data processing unit and store the received data. The data processing unit is configured to determine at least the time ranges in which the current consumed by the traction electric motor changes by no more than two percent of the moving average for at least 10 seconds, to filter this data from the array of all received data and store them in data storage unit. The current sensor data receiving unit is functionally connected with the data processing unit. The data processing unit is functionally linked to the data storage unit. All units of the device are installed in the housing. 3 C.p. f-ly, 1 dwg

Description

The technical field to which the utility model belongs

The utility model relates to the field of data collection tools, in particular, to devices for collecting data on the traction motor of a locomotive.

State of the art

Known device for automatic control of mechanical damage to three-phase asynchronous electric motors (patent RU2356061, 20.05.2009). The invention relates to the field of electrical engineering and can be used for automatic control of mechanical damage to three-phase asynchronous electric motors by measuring the stator current and analyzing its amplitude-frequency characteristics. EFFECT: increased reliability and selectivity of recognition of the type of mechanical damage - elimination of false alarms. The device implements a method for automatic control of mechanical damage to three-phase asynchronous electric motors, which consists in recording the values of the phase current of the electric motor during a given time interval, isolating the analyzed characteristic frequencies, converting the received signal from analog to digital form, performing a spectral analysis of the received signal, amplitude current harmonics obtained as a result of spectral analysis are compared with reference values of harmonics at characteristic frequencies, and the set of characteristic frequencies is set depending on the design of the electric motor, the type of alleged damage, and the conclusion about the presence of the alleged damage is made by exceeding the values of the analyzed signal over the reference values.

However, this decision does not say anything about recording data on the operation of the electric motor, provided there is a small change in the consumed current of the locomotive engine.

Known selected as a prototype solution, describing a device for diagnostics of mechanisms and systems with an electric drive (RU2431152, 10.10.2011). The invention relates to the field of diagnostics of mechanisms and systems with an electric drive, in particular in an explosion-proof design, based on the analysis of the parameters of the harmonic components of currents and voltages generated by an electric motor. EFFECT: increased reliability. Essence: during a given time interval, the values of the phase currents and voltages of the electric motor are recorded, then they are decomposed into harmonic components and the amplitude and phase of the harmonic components are measured, the harmonic components coming from the network are filtered. On the basis of the set of parameters of harmonic components using an artificial neural network, the technical state is identified and the resource of trouble-free operation of the diagnosed object is predicted.

However, this decision does not say anything about recording data on the operation of the electric motor, provided there is a small change in the consumed current of the locomotive engine.

Disclosure of a utility model

In one aspect of the invention, an apparatus for collecting data on a traction motor of a locomotive is disclosed, comprising:

body;

a current sensor data receiving unit configured to receive data on the current consumed by a traction motor (TED);

a data processing unit configured to receive data from a current sensor data receiving unit;

a data storage unit configured to receive data from the data processing unit and store the received data,

moreover

the data processing unit is configured to determine at least the time ranges in which the current consumed by the traction electric motor changes by no more than two percent of the moving average for at least 10 seconds, to filter this data from the array of all received data and store them in data storage unit;

the data receiving unit of the current sensor is functionally connected with the data processing unit, the data processing unit is functionally connected with the data storage unit, all the units of the device are installed in the housing.

In additional aspects, it is disclosed that the sampling frequency of the locomotive movement data receiving unit is at least 10 kHz, preferably 25 kHz; the data processing unit is made with the additional ability to determine the time ranges in which the current consumed by the TED changes by no more than two percent of the moving average for at least 10 seconds, and the amplitude of the current consumed by the TED varies in the range from 100 to 800 And, filter this data from the array of all received data and store it in the data storage unit; contains a data transmission unit configured to transmit data from the data storage unit to external data processing means; the data processing unit is configured to determine at least the time ranges in which the current consumed by the traction electric motor changes by no more than two percent of the moving average for at least 20 seconds, to filter this data from the array of all received data and store them in data storage unit.

The main tasks solved by the declared utility model are collecting data on the operation of the traction motor of the locomotive, filtering this data.

The essence of the utility model is that an electrical signal is received from the current sensors from traction motors (TED); process this signal and filter out only the data necessary for further processing: save the data obtained with an essentially constant current consumption of the traction electric motor of the locomotive for a predetermined period of time, and, if necessary, transfer it to an external device.

The technical result achieved by the solution consists in reducing the amount of memory required for storing and transmitting data on the operation of the traction electric motor of the locomotive.

Brief Description of Drawings

1 shows a block diagram of a device for collecting data on the operation of a traction electric motor.

Implementation of the utility model

Non-contact current sensors are placed on the power cables of the TED; these sensors read an analog signal characterizing the current consumed by the TED. Then the read signal is digitized and fed to the processing unit, which determines the time periods in which the consumed current does not substantially change, and then writes the current data for this period of time to the data storage unit.

The device 100 itself for collecting data on the operation of the electric motor is implemented in the form of a structurally single device located in the housing (Fig. 1), containing a unit 101 for receiving data on the current consumed by the electric motor; a data processing unit 102, configured to command a storage unit 103 to store current consumption data under the condition of a detected period of substantially constant current consumption of the traction electric motor for a predetermined period of time; storage unit 103, configured to store data processed by unit 102. The units are functionally connected to each other by means of electrical communication lines and are located in a single body of the data acquisition device.

The housing contains input contacts, in particular, connectors for connecting wires from sensors, outputting wires for transmitting signals.

The housing may house a data output unit from the storage unit 103. The output unit can use any suitable communication standard: wired or wireless. In particular, the data output unit can output data to a USB flash drive or other portable data carrier, via a cable or other wired communication line, using standard communication protocols.

Detailed Description of Embodiments

The current sensors are preferably analog, made with the possibility of converting the measured signal into a form available for digitization.

The unit 101 for receiving data on the current consumed by the electric motor can be at least a connector for transmitting data from the sensor to the data processing unit 102, in other embodiments, the unit 101 is receiving circuits, filters for cleaning the signal from interference, ADC, if the signal from the sensor is analog. The ADC has a sampling rate of at least 10 kHz, preferably at least 25 kHz.

The data processing unit 102 is an electronic unit implemented on the basis of a processor, microprocessor, controller, microcontroller, integrated circuit, and the like. The processing unit 102 executes the program code that instructs it to poll the unit 101 to obtain data, then, when a certain condition is met, the processing unit 102 writes the processed data to the storage unit 103.

The program code instructs to store the data on the consumed current of the traction electric motor when this current is essentially constant for a predetermined time, for example, 10, 20, 30 or 60 seconds. The data on the current consumed by the traction electric motor is recorded only for these periods of time, the rest of the data is discarded. Essentially constant is a current for which the instantaneous values of the amplitude of the consumed current differ from the moving average value of the consumed current by no more than two, one or half percent. If the instantaneous current value differs from the moving average by more than two, one or half percent, then this value is not recorded in the storage unit 103.

The duration of the time window in which the substantially constant current consumption of the traction electric motor is checked is selected in order to obtain the maximum possible information. An excessive increase in the time window leads to a decrease in the amount of data obtained, since the periods of long-term constant current consumption of the traction electric motor may be infrequent, and also will not allow obtaining data on the operation of the traction electric motor at short increased loads. Too short a time window will not reduce the amount of stored data on the one hand and fill the memory with information from which it is difficult to extract useful data on the other side.

The easiest way is to extract useful information about the state of the traction electric motor from the data obtained with the same current consumption, since such data are not noisy by the components associated with a change in the operating mode of the traction electric motor, therefore, in the proposed solution, it is proposed to filter the data on the current consumption of the electric motor. A too strict approach to filtering data by amplitude can lead to the fact that due to noise a lot of data carrying useful information will be discarded, and too soft an approach - will lead to the appearance of a large amount of "extra" data in the saved data, which will interfere with further processing.

The memory unit 103 is designed to store data sent from the data processing unit 102. It can be implemented on the basis of permanent or random access memory of any type.

These blocks can be fully or partially implemented on a single hardware base, for example, on the basis of a single microprocessor containing ADC modules, data processing modules, data storage modules.

Device operation

The authors have developed an algorithm for filtering data, which consists of several stages.

Division of the received data into data corresponding to different values of the current consumption of the traction electric motor.

Search for intervals of operation of traction motors of a predetermined duration, in which the current consumption is essentially constant.

Storing data corresponding to intervals with substantially constant current consumption and a predetermined duration.

The approach described above makes it possible to exclude noise interfering with further processing, including the analysis of the spectrum of the consumed current to assess the breakdowns and degradation of traction electric motors.

Description of embodiments

Embodiment 1

In the first embodiment, the proposed device for collecting data on the traction motor of a locomotive is the device shown in Fig. 1. This apparatus 100 comprises a motor current consumption data receiving unit 101; block 102 of data processing; data storage unit 103. The units are functionally connected to each other using electrical communication lines and are located in a single housing. Alternatively, these blocks are structurally a single block.

A feature of this embodiment is that the processing unit 102 realizes the filtering of data on the current consumed by the electric motor based on the amount of the consumed current of the traction electric motor: it stores data in the storage unit 103 only with constant current consumption for a predetermined duration. This reduces the amount of memory required for storing data on the current consumed by the electric motor, which is especially important at high sampling rates.

Data is saved under two conditions:

the value of the consumed current of the traction electric motor is essentially constant;

the duration of the time period during which the current consumption of the traction motor is substantially constant exceeds a predetermined threshold duration.

The program code written in the data processing unit 102 realizes the constant check of these two conditions and commands data to be written to the data storage unit 103 when both conditions are met.

Alternatively, the device in FIG. 1 may further comprise a unit for transmitting data to a remote data processing system. The transmission unit can use the IoT standard or any other suitable data transmission standard. In this embodiment, the claimed data collection device implements the functionality of the data transmission device about the traction motor of the locomotive. Since the amount of transmitted data is reduced due to the presence of conditions for recording data, the amount of information transmitted to external systems is also reduced.

The processing unit 102 may also filter out the current consumption data if the current amplitude is less than 100 A or greater than 800 A.

The elements mentioned in the application in the singular do not exclude the plurality of elements, unless otherwise specified.

The functional connection of elements should be understood as a connection that ensures the correct interaction of these elements with each other and the implementation of one or another functionality of the elements. Particular examples of functional communication can be communication with the ability to exchange information, communication with the ability to transmit electric current, communication with the ability to transmit mechanical motion, communication with the ability to transmit light, sound, electromagnetic or mechanical vibrations, etc. The specific type of functional relationship is determined by the nature of the interaction of these elements, and, unless otherwise indicated, is provided by widely known means using principles widely known in the art.

The methods disclosed herein comprise one or more steps or steps to achieve the described method. The steps and / or actions of the method can replace each other without going beyond the scope of the utility model formula. In other words, if a specific order of steps or actions is not defined, the order and / or use of specific steps and / or actions can be changed without going beyond the scope of the utility model formula.

The application does not indicate specific software and hardware for the implementation of blocks in the drawings, but a specialist in the field of technology should understand that the essence of the utility model is not limited to a specific software or hardware implementation, and therefore any software and hardware can be used to implement the utility model. known in the art. So hardware can be implemented in one or more specialized integrated circuits, digital signal processors, digital signal processing devices, programmable logic devices, user-programmable gate arrays, processors, controllers, microcontrollers, microprocessors, electronic devices, other electronic modules made with the ability perform the functions described in this document, a computer, or a combination of the above.

Although not specifically mentioned, it is obvious that when it comes to storing data, programs, etc., a computer-readable storage medium is meant, examples of computer-readable storage media include read only memory, random access memory, register, cache memory , semiconductor storage devices, magnetic media such as internal hard disks and removable disks, magneto-optical media and optical media such as CD-ROMs and digital versatile disks (DVDs), and any other storage media known in the art.

While exemplary embodiments have been described in detail and shown in the accompanying drawings, it should be understood that such embodiments are illustrative only and are not intended to limit the broader utility model, and that the utility model should not be limited to the specific arrangements shown and described, and designs as various other modifications may be apparent to those skilled in the art.

The features mentioned in various dependent claims, as well as the implementations disclosed in various parts of the description, can be combined with the achievement of beneficial effects, even if the possibility of such a combination is not explicitly disclosed.

Claims (11)

1. A device for recording and storing data on the current consumed by the electric motor of the locomotive, containing: body; a current sensor data receiving unit configured to receive data on the current consumed by a traction motor (TED) of a locomotive; a data processing unit configured to register data from the current sensor data receiving unit; a data storage unit configured to receive data from the data processing unit and store the received data, moreover the data processing unit is configured to determine at least the time ranges in which the current consumed by the traction electric motor changes by no more than two percent of the moving average for at least 10 seconds, to filter this data from the array of all received data and store them in data storage unit; the data receiving unit of the current sensor is functionally connected with the data processing unit, the data processing unit is functionally connected with the data storage unit, all the units of the device are installed in the housing. 2. The device according to claim 1, wherein the sampling frequency of the locomotive movement data receiving unit is at least 10 kHz, preferably 25 kHz. 3. The device according to claim 1, in which the data processing unit is made with the additional ability to determine the time ranges in which the current consumed by the traction electric motor changes by no more than two percent of the moving average for at least 10 seconds, and the amplitude of the current, consumed TED, varies in the range from 100 to 800 A, filter this data from the array of all received data and store them in the data storage unit. 4. The apparatus of claim 1 further comprising a data transmission unit configured to transmit data from the data storage unit to an external data processing means.

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